A polling driver tag can be configured to scan a communication driver tag on a regular schedule. The key to doing so is proper configuration of the Scan Interval and Delay After Scan Interval properties (featured on the I/O tab of the polling driver tag).
The Scan Interval property specifies the number of seconds between polls, starting at midnight, while the Delay After Scan Interval property specifies the number of seconds after the Scan Interval to trigger the poll.
Note: The Delay After Scan Interval property should never be greater than the Scan Interval property.
The following 3 examples have been provided to help guide you.
Poll at 2-hour Intervals Starting at 1:00 am
If you want the poll to happen at 1:00 am, 3:00 am, 5:00 am, 7:00 am (and so forth), the Scan Interval property should be set to 7200 seconds (2 hours), and the Delay After Scan Interval property should be set to 3600 seconds (1 hour after midnight).
Poll Every 10 Minutes Starting at Midnight
If you want the poll to happen at 12:10 am, 12:20 am, 12:30 am (and so forth), the Scan Interval property should be set to 600 seconds (10 minutes), and the Delay After Scan Interval property should be set to 0 seconds (midnight).
Poll At 3:00 am and 3:00 pm Daily
If you want the poll to happen at 3:00 am and 3:00 pm every day, the Scan Interval property should be set to 43200 seconds (12 hours), and the Delay After Scan Interval property should be set to 10800 seconds (3 hours).